Comparison Daewoo DAT 4555 vs Daewoo DAT 2500E

— Petrol. Gasoline internal combustion engine. Such engines have good power, are easy to operate and are not limited by the length of the power cord (like electric ones). Their disadvantages are a significant level of noise, exhaust emissions and the need to purchase fuels and lubricants, as a result, a rather high cost of operation. However, most two-wheel tractors and cultivators have gasoline engines.

— Diesel. An internal combustion engine, which is similar in design to a petrol engine, but has a number of differences in the principle of operation and, as a result, in operation. So, it refuels with diesel fuel, which is somewhat cheaper than gasoline. Diesel engines have good torque at low revs, making them well suited for heavy work (ploughing, hauling). On the other hand, they are not without drawbacks — the high cost of repairs and high requirements for fuel purity. As a result, diesel two-wheel tractors and cultivators are less common.

— Electric (mains). Electric motors powered by an electrical network, most often — ordinary household 230 V. The advantages of all electric motors over gasoline / diesel ones are, in particular, low cost (including in operation), smaller dimensions and weight, ease of maintenance ( it is practically not required), low noise level and absence of exhaust gases. On the other hand, their power is relatively low — even for...mains-powered models, it does not exceed 3 kW. Therefore, mainly units for small volumes of work are made electric, which are more like cultivators than full-fledged two-wheel tractors. It is also worth noting here that when powered from the mains, the mobility of the unit is limited by the length of the power cord. On the other hand, models with such a power supply are generally more powerful than rechargeable ones, with the same power they are lighter and cheaper, and the operating time is almost unlimited.

— Electric (battery). Electric motors powered by batteries. The main features of electric motors as a whole are described above, and battery power makes the unit as autonomous as possible, independent of sockets and the length of the power cord. At the same time, models with this power supply are even less powerful than devices connected to the network — most of them do not even reach 1.5 kW. In addition, the battery affects the weight and cost of the unit, and the operating time is limited; charging the battery takes a lot of time and still requires a power source. So it makes sense to use cultivators of this type only when the volume of work is small and there are no outlets nearby; such situations are extremely rare, so this option has not gained distribution.

The type of gearbox provided in the design of the two-wheel tractor.

The gearbox is a mechanism for transmitting rotation from the motor shaft to the working shaft; the speed of rotation is reduced, and the tractive effort, respectively, increases. In modern units, worm, chain, gear and gear-chain gearboxes can be used; here are their main features:

— Worm. Gearboxes based on a worm gear are mainly used in light two-wheel tractors with passive cutters (motor cultivators). With simplicity and low cost, such a gearbox provides a high gear ratio, which makes it possible to achieve good traction at a relatively low engine power. Other advantages of worm gears include compactness, minimum noise level, smooth running and self-braking ability. On the other hand, such gearboxes do not tolerate high loads, which determined the scope of their application.

— Chain. Gearboxes based on a chain drive — two gears connected by a chain (similar to the mechanism used in bicycles). Such gearboxes are somewhat more expensive than worm gears, but they are more reliable and able to work with higher loads. Another advantage lies in the small width of the body, which is especially important for motor cultivators — the gearbox does not limit the depth of processing, since it can be buried in the soil simultaneously with the cutters.

...— Geared. The most advanced type of modern gearboxes. Such mechanisms are highly reliable and durable, they normally endure long-term work at high loads. The downside of these advantages is the high price. Gear reducers are used mainly on professional equipment, for which "endurance" is critical.

— Gear-chain. A compromise option, which, when installed on a motor cultivator, increases its performance (compared to chain and worm), and when installed on a motor block, slightly reduces the cost of the latter.

Type of internal combustion engine (gasoline or diesel, see "Engine type") of the cultivator/two-wheel tractor.

— 2-stroke. The advantages of two-stroke engines are simple design (as a result, low cost) and high power. On the other hand, they have high noise and fuel consumption. In addition, there are difficulties with the fuel itself: such engines are refueled with a gasoline-oil mixture, which requires exact proportions, otherwise the engine will either wear out a lot (with a lack of oil) or smoke (with an excess of it). In two-wheel tractors, two-stroke engines are only gasoline, diesel engines of this type are not used.

— 4-stroke. Such engines are more complex in design, more expensive and less powerful (with equal volume) than two-stroke ones. On the other hand, they are less noisy, have lower fuel consumption, and the fuel itself is refueled separately from the oil, and there is no need to bother with the preparation of the mixture when refueling. Also note that diesel engines in two-wheel tractors are made only 4-stroke.

Model of the engine installed in the two-wheel tractor / cultivator. The main performance data of the engine is usually indicated in the general data for the unit. However, knowing the exact name of the motor, you can find more detailed information on it — starting from specific data like torque or revolutions and ending with reviews and reviews. Also, data on the engine model can be useful when searching for spare parts or consumables.

The working volume of the gasoline or diesel engine of the cultivator / two-wheel tractor. For an internal combustion engine of the same type (see "Type of internal combustion engine"), power and fuel consumption usually directly depend on the volume. Also, the classification of a two-wheel tractor as a vehicle according to the traffic rules of a particular country may depend on the engine volume; you should pay attention to this if you plan to use the unit as a tractor and drive on roads.

Engine power of the cultivator / walk-behind tractor in horsepower. The basic unit of power these days is the watt, but gasoline and diesel engines (see "Engine type") often use the more traditional horsepower designation. 1 hp is approximately equal to 735 watts.

A more powerful engine allows you to achieve higher productivity, width and depth of processing. On the other hand, high power significantly affects the price, weight and dimensions of the unit, as well as electricity / fuel consumption. In light of this, the characteristics of the engine are selected by the manufacturer, taking into account which “weight category” the walk-behind tractor belongs to. The most limited modern units have a power of up to 2 hp., in the most severe and advanced, this figure can exceed 13 hp. ; 4 - 7 HP can be called an average, and 2 - 4 hp. and 7 - 13 hp respectively below and above average.

Detailed recommendations on the optimal power for a particular situation can be found in special sources.

Motor block / cultivator engine power in watts. This designation is normally used for electric engines, but can also be used for gasoline/diesel engines, along with horsepower (for these, see Engine Power above).

A more powerful engine allows you to achieve higher productivity, width and depth of processing. On the other hand, high power significantly affects the price, weight and dimensions of the unit, as well as electricity / fuel consumption. In light of this, the engine power is selected by the manufacturer, taking into account which “weight category” the walk-behind tractor belongs to, what characteristics it should show. So, the lightest models have a power of up to 1.5 kW, just such a device is best suited for a small area of 6 - 8 acres. Motoblocks up to 3 kW are already able to cope with 10 - 15 acres, a power of 3.5 - 5 kW is suitable for a plot from 50 acres to a couple of hectares. Units for 5 - 10 kW already belong to the professional level, they are "too tough" open spaces of 7 - 10 hectares; and the heaviest and most powerful modern walk-behind tractors have a power of more than 10 kW.

Starting method of the gasoline or diesel engine (see "Engine type") provided in the unit.

— Manual. Starting due to the muscular strength of a person: the operator pulls a special cable or turns the handle, due to which the shaft turns and the engine receives the initial impulse necessary for operation. Manual start systems are inexpensive, light and compact, and do not depend on batteries that can run out at the worst possible moment. On the other hand, the starting process itself can require considerable effort, especially in a heavy, powerful engine. Therefore, this option is used mainly in relatively low-power models.

— Electric starter. Starting due to the starter — a small electric motor powered by a battery. Such systems are much more convenient than manual ones — the operator actually only needs to press a button or turn a key; at the same time they are suitable even for the most powerful motors. On the other hand, a starter with a battery significantly increases the weight, dimensions and cost of the entire unit, and with a long idle time, the battery may run out and the system will become useless (however, a spare manual "starter" may be provided for this case). Therefore, this starting method is used exclusively in heavy equipment, for which the ability to do without manual start is more important than the described disadvantages.

The volume of the fuel tank of the cultivator / two-wheel tractor; knowing this parameter and fuel consumption (see above), it is possible to determine the maximum operating time of the unit on a single refill. If you plan to use the device in large areas or to work for a long time, it makes sense to look for a model with a large tank — it will not have to be filled often. On the other hand, for short-term work in small areas, a large tank is not required — in this case, it only increases the weight and dimensions of the unit.